Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 36, Issue 3, Pages 820-827Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2012.10.018
Keywords
Testing; Domestic heat pump; Thermal analysis; High temperature; COP; Efficiency
Categories
Funding
- EPSRC [EP/K011847/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K011847/1] Funding Source: researchfish
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Air source heat pumps have numerous advantages in many applications over other heating equipment in marine climates with regard to energy efficiency. The main concerns are based around maintaining a sufficiently high seasonal coefficient of performance (COP) when (a) utilising cold air as a heat source and (b) delivering hot water to a residential heating circuit originally designed for water temperatures of 60 degrees C or more with oil heating. The economised vapour injection (EVI) compressor has the capability of overcoming some of the difficulties of high temperature lift operation during cold ambient conditions. However it is not clear except ambient temperature how the other ambient factors may affect the performance of EVI air-source heat pump in marine climates. This paper evaluates operating performance with the defrost effect for a retrofit residential EVI air-source heat pump in Belfast, UK. The ambient factors, which affect the performance of the heat pump defrosting, were studied. The investigation was to optimise the operation of an EVI air source heat pump operating under defrost conditions encountered in maritime climates. (C) 2012 Elsevier Ltd and IIR. All rights reserved.
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